Urgent!!! - How to capture various dates on Purchase order

Hi All,

My customer want to capture following at item level and then automatically calculate good ETA.

1. Supplier lead time (to produce a particular item / product).... I know that we can setup purchase lead time on Item coverage group, but it gives me final ETA date. 

2. Shipping time from supplier to customer's warehouse

3. ETA = Today + 1 + 2

I know it is an easy customization, but i want to see, if there is anything available Out of the box and somehow we can avoid customization. 

Regards

Amit